SummaryAim. The aim of the study was to find relationship between obsessive-compulsive symptoms and level and characteristic of physical activity among patients with anorexia nervosa (AN). Material and methods. 76 female patients, aged 14.8 +/ – 1.8 years with AN completed the Polish version of the Leyton Obsessional Inventory-Child Version (LOI-CV). In order to assess the level and type of physical activity, Physical Activity Questionnaire was developed. Results. 35 (46%) subjects were qualified to HR group (Obsessive-Compulsive Disorder “High-risk group”) (25 or more points on the Interference Score of LOI-CV) and 41 (54%) to nHR group (no “High-risk group”). nHR patients spent less studying in a standing position, significantly more often used elevators rather than stairs and, according to their parents, devote less time for physical activity. Positive correlation between the caregiver’s perception of patient’s weekly activity and the number of “YES” answers in LOI-CV, positive trend between Patient’s Activity Index or summarised Activity Index and the number of “YES” answers in LOI-CV were found. We also found negative correlation between the time spent studying at school and the number of “YES” answers in LOI-CV. Conclusions. The results show that there is a connection between obsessive-compulsive symptoms and the hyperactivity in AN patients.